List and define the three periods of prenatal development. ...

[fox]

List and define the three periods of prenatal development.
 
  What will be an ideal response?

Question 2

Describe two environmental dangers and their impact on development.
 
  What will be an ideal response?

[joneynes]

Answer to Question 1

ANSWER: Zygote begins when the sperm and ovum unite and lasts about two weeks, embryo
begins when zygote implants in uterine wall and lasts until about eight weeks, fetus begins about nine weeks and ends at birth.

Answer to Question 2

ANSWER: Answers will vary but should include two of the following: There are many dangers in
the environment that can harm children. Substance abuse before or after birth can be harmful to mother and child. Methamphetamine and AIDS are particularly widespread and dangerous for children. Other dangers include unsafe drinking water, inadequate sanitation, air pollution, inadequate food sanitation, poor housing and inadequate waste disposal.

[fox]

Gracias!

[Jsherida]

Excellent